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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#89112#5258. MortgageDenisovWA 20ms18212kbC++1412.1kb2023-03-19 03:21:492023-03-19 03:21:51

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-03-19 03:21:51]
  • 评测
  • 测评结果:WA
  • 用时:20ms
  • 内存:18212kb
  • [2023-03-19 03:21:49]
  • 提交

answer

#pragma GCC optimize("Ofast", "unroll-loops")
//#pragma GCC target("sse", "sse2", "sse3", "ssse3", "sse4")

#ifdef __APPLE__
#include <iostream>
#include <cmath>
#include <algorithm>
#include <stdio.h>
#include <cstdint>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
#include <bitset>
#include <map>
#include <queue>
#include <ctime>
#include <stack>
#include <set>
#include <list>
#include <random>
#include <deque>
#include <functional>
#include <iomanip>
#include <sstream>
#include <fstream>
#include <complex>
#include <numeric>
#include <immintrin.h>
#include <cassert>
#include <array>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <thread>
#else
#include <bits/stdc++.h>
#endif

#define all(a) a.begin(),a.end()
#define len(a) (int)(a.size())
#define mp make_pair
#define pb push_back
#define fir first
#define sec second
#define fi first
#define se second

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;
typedef long double ld;

template<typename T>
bool umin(T &a, T b) {
    if (b < a) {
        a = b;
        return true;
    }
    return false;
}
template<typename T>
bool umax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

#if __APPLE__
#define D for (bool _FLAG = true; _FLAG; _FLAG = false)
#define LOG(...) print(#__VA_ARGS__" ::", __VA_ARGS__) << endl
template <class ...Ts> auto &print(Ts ...ts) { return ((cerr << ts << " "), ...); }
#else
#define D while (false)
#define LOG(...)
#endif

const int max_n = 2e5+10;

const int max_log=31;

const long long inf = 4000111222000111222LL;

/*struct Line {
    long double k, b;
    Line(long double k, long double b): k(k), b(b) {
    }
    long double get_value(long double x) const {
        return k * x + b;
    }
    bool operator < (const Line &l) const {
        return k > l.k || (k == l.k && b < l.b);
    }
};
long double intersection(const Line &l1, const Line &l2) {
    return (l2.b - l1.b) / (l1.k - l2.k);
}*/

struct Line {
    long long k, b;

    Line(long long k = 0, long long b = 0): k(k), b(b) {
    }

    long long get_value(long long x) const {
        return k * x + b;
    }

    bool operator < (const Line &l) const {
        return k > l.k || (k == l.k && b < l.b);
    }
};

long long intersection(const Line &l1, const Line &l2) {
    long long a = l2.b - l1.b;
    long long b = l1.k - l2.k;
    return a / b - ((a ^ b) < 0 && a % b);
}

template<int x_increase>
class LineContainer {
public:
    LineContainer(): pos(0) {
    }

    void clear() {
        pos = 0;
//        last_x = (x_increase == 1 ? numeric_limits<long long>::min() : numeric_limits<long long>::max());
        v.clear();
    }

    void add(const Line &l) {
        if (!v.empty()){
            assert(v.back().k >= l.k);
            if (v.back().k == l.k) {
                if (l.b >= v.back().b) {
                    return;
                }
                v.pop_back();
            }
            while (v.size() >= 2 && intersection(v[v.size() - 2], v.back()) >= intersection(v.back(), l)) {
                v.pop_back();
            }
        }
        v.push_back(l);
    }

    long long get_min(long long x) {
        if (v.empty()) {
            return inf;
        }
        if (x_increase == 1) {
//            assert(last_x <= x);
//            last_x = x;
            pos = min(pos, v.size() - 1);
            while (pos + 1 < v.size() && v[pos].get_value(x) > v[pos + 1].get_value(x)) {
                ++pos;
            }
            return v[pos].get_value(x);
        } else if (x_increase == -1) {
//            assert(last_x >= x);
//            last_x = x;
            while (v.size() >= 2 && v.back().get_value(x) > v[v.size() - 2].get_value(x)) {
                v.pop_back();
            }
            return v.back().get_value(x);
        } else {
            int l = -1, r = v.size() - 1;
            while (r - l > 1) {
                int mid = (l + r) / 2;
                if (x <= intersection(v[mid], v[mid + 1])) {
                    r = mid;
                } else {
                    l = mid;
                }
            }
            return v[r].get_value(x);
        }
    }

    size_t pos;
//    long long last_x;
    vector<Line> v;
};

namespace fastio {

    const int buf_size = 1 << 14, small = 30;
    char buf_read[buf_size + small];
    char buf_write[buf_size + small];
    char *ptr_read = buf_read + buf_size;
    char *ptr_write = buf_write;

    long long read_int() {
#if __APPLE__
        ll x;
        cin>>x;
        return x;
#endif
        auto getChar = []() {
            if (ptr_read == buf_read + buf_size){
                buf_read[fread(buf_read, 1, buf_size, stdin)] = 0;
                ptr_read = buf_read;
            }
            return *ptr_read++;
        };
        char c = getChar();
        while (c && (c < '0' || c > '9') && c != '-') {
            c = getChar();
        }
        long long z = 1;
        if (c == '-') {
            z = -1;
            c = getChar();
        }
        long long res = 0;
        while (c >= '0' && c <= '9'){
            res = res * 10 + (c - '0');
            c = getChar();
        }
        return z * res;
    }

    void write_flush() {
        fwrite(buf_write, 1, ptr_write - buf_write, stdout);
        ptr_write = buf_write;
    }

    void write_int(long long x) {
        if (x < 0) {
            *ptr_write++ = '-';
            x = -x;
        }
        char *start = ptr_write;
        if (!x) {
            *ptr_write++ = '0';
        }
        while (x) {
            *ptr_write++ = x % 10 + '0';
            x /= 10;
        }
        reverse(start, ptr_write);
        if (ptr_write >= buf_write + buf_size) {
            write_flush();
        }
    }

    void write_char(char c) {
        *ptr_write++ = c;
        if (ptr_write >= buf_write + buf_size) {
            write_flush();
        }
    }

}

LineContainer<0> lc0;
LineContainer<+1> lc1;

int n,m;
ll pref[max_n];

int l[max_n];
int r[max_n];

int L[max_n];
int R[max_n];
int M[max_n];
int ans[max_n];

bool solved_req[max_n];
ll mn[max_n];

LineContainer<+1> lc1_tree[2*max_n];
//vector<int> req_vh[4*max_n];

//vector<int> on_left;
//vector<int> on_right_partially;
//vector<int> on_right_fully;
//
//void solve_mn_fast(int l1,int r1,vector<int> req)
//{
//    if (l1==r1){
//        for (auto i:req){
//            mn[i]=min(mn[i],pref[l1]-1ll*l1*M[i]);
//        }
//        return;
//    }
//    int m1=(l1+r1)/2;
//    vector<int> req_l;
//    vector<int> req_r;
//    on_left.clear();
//    on_right_partially.clear();
//    on_right_fully.clear();
//    for (auto i:req){
//        if (r[i]<=m1){
//            req_l.pb(i);
//        }
//        else if (l[i]>=m1+1){
//            req_r.pb(i);
//        }
//        else{
//            req_l.pb(i);
//            if (r[i]<r1){
//                on_right_partially.pb(i);
//            }
//            else{
//                on_right_fully.pb(i);
//            }
//        }
//    }
//    sort(all(on_right_partially),[&](const int& lhs,const int &rhs){
//        return r[lhs]>r[rhs];
//    });
//    {
//        lc0.clear();
//        for (int j=m1+1;j<=r1;j++){
//            lc0.add(Line(-j,pref[j]));
//            while (!on_right_partially.empty() && r[on_right_partially.back()]==j){
//                int id=on_right_partially.back();
//                on_right_partially.pop_back();
//                mn[id]=min(mn[id],lc0.get_min(M[id]));
//            }
//        }
//        assert(on_right_partially.empty());
//    }
//    {
//        lc1.clear();
//        for (int j=m1+1;j<=r1;j++){
//            lc1.add(Line(-j,pref[j]));
//        }
//        for (auto i:on_right_fully){
//            mn[i]=min(mn[i],lc1.get_min(M[i]));
//        }
//    }
//    solve_mn_fast(l1,m1,req_l);
//    solve_mn_fast(m1+1,r1,req_r);
//}

void build(int v,int l,int r)
{
    lc1_tree[v].v.reserve(r-l+1);
    for (int i=l;i<=r;i++){
        lc1_tree[v].add(Line(-i,pref[i]));
    }
    if (l==r){
        return;
    }
    int m=(l+r)/2;
    build(v+1,l,m);
    build(v+2*(m-l+1),m+1,r);
}

//void push_req(int v,int l,int r,int tl,int tr,int id)
//{
//    if (l>tr || r<tl){
//        return;
//    }
//    if (l>=tl&&r<=tr){
//        req_vh[v].pb(id);
//        return;
//    }
//    int m=(l+r)/2;
//    push_req(2*v,l,m,tl,tr,id);
//    push_req(2*v+1,m+1,r,tl,tr,id);
//}

void solve_mn_fast2(int v,int l1,int r1,vector<int> &req)
{
    if (l1==r1 || req.empty()){
        for (auto i:req){
            mn[i]=min(mn[i],pref[l1]-1ll*l1*M[i]);
        }
        return;
    }
    int m1=(l1+r1)/2;
    vector<int> left;
    vector<int> right;
    lc1_tree[v].pos = 0;
//    lc1_tree[v].last_x = numeric_limits<long long>::min();
    for (auto i:req){
        if (r[i] < l1 || r1 < l[i]) continue;
        if (l[i]<=l1 && r1<=r[i]){
            mn[i]=min(mn[i],lc1_tree[v].get_min(M[i]));
        }
        else {
            if (l[i]<=m1){
                left.pb(i);
            }
            if (r[i]>=m1+1){
                right.pb(i);
            }
        }
    }
    solve_mn_fast2(v+1,l1,m1,left);
    solve_mn_fast2(v+2*(m1-l1+1),m1+1,r1,right);
}

void solve_req(vector<int> &req)
{
    LOG("solve_req");
    for (auto i:req){
        solved_req[i]=1;
        mn[i]=1e18;
    }
//    for (auto i:req){
//        for (int j=l[i];j<=r[i];j++){
//            mn[i]=min(mn[i],pref[j]-1ll*j*M[i]);
//        }
//    }
    /*sort(all(req),[&](const int& lhs,const int &rhs){
        return M[lhs]<M[rhs];
    });*/
    solve_mn_fast2(1,0,n-1,req);
//    solve_mn_fast(0,n-1,req);
//    for (int i=0;i<4*max_n;i++){
//        lc1_tree[i].pos = 0;
//        lc1_tree[i].last_x = numeric_limits<long long>::min();
//        sort(all(req_vh[i]),[&](const int& lhs,const int &rhs){
//            return M[lhs]<M[rhs];
//        });
//        for (auto j:req_vh[i]){
//            mn[j]=min(mn[j],lc1_tree[i].get_min(M[j]));
//        }
//    }
    for (auto i:req){
        LOG(i,M[i],mn[i]);
        if (mn[i]-pref[l[i]-1]+1ll*(l[i]-1)*M[i]<0){
            solved_req[i]=0;
        }
    }
}

/*
i,M[i],mn[i] :: 0 500000005 -3500000002
i,M[i],mn[i] :: 1 500000005 -1499999989
i,M[i],mn[i] :: 2 500000005 -1999999989
i,M[i],mn[i] :: 3 500000005 -2499999996
i,M[i],mn[i] :: 4 500000005 -4000000008

i,M[i],mn[i] :: 0 500000005 -3500000002
i,M[i],mn[i] :: 1 500000005 -1499999989
i,M[i],mn[i] :: 2 500000005 -1999999989
i,M[i],mn[i] :: 3 500000005 -2499999996
i,M[i],mn[i] :: 4 500000005 -4000000008
*/

int main() {
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    n=fastio::read_int();
    m=fastio::read_int();
    for (int i=0;i<n;i++){
        int a;
        a=fastio::read_int();
        pref[i] = (i==0 ? 0 : pref[i-1]) + a;
    }
    build(1,0,n-1);
    for (int i=0;i<m;i++){
        int s,k;
        s=fastio::read_int();
        k=fastio::read_int();
        l[i]=s-1;
        r[i]=s+k-2;

//        push_req(1,0,n-1,l[i],r[i],i);

        L[i]=-1;
        R[i]=1e9+10;
    }
    for (int iter=0;iter<max_log;iter++){
        vector<int> req;
        for (int i=0;i<m;i++){
            if (L[i]!=R[i]){
                M[i]=(L[i]+R[i]+1)/2;
                req.pb(i);
            }
        }
        solve_req(req);
        for (int i=0;i<m;i++){
            if (L[i]!=R[i]){
                if (solved_req[i]){
                    L[i]=M[i];
                }
                else{
                    R[i]=M[i]-1;
                }
            }
        }
    }

    for (int i=0;i<m;i++){
        if (L[i]==-1){
            cout<<"stay with parents"<<"\n";
        }
        else{
            cout<<L[i]<<"\n";
        }
    }
}

/*
9 5
6 1 10 9 5 -2 3 1 -1
3 6
1 4
3 3
6 1
8 2
*/

詳細信息

Test #1:

score: 100
Accepted
time: 10ms
memory: 15984kb

input:

10 10
21 18 19 18 16 15 13 13 13 10
10 1
6 4
7 3
2 2
6 5
2 6
3 2
4 1
1 5
6 3

output:

10
13
13
18
12
16
18
18
18
13

result:

ok 10 lines

Test #2:

score: -100
Wrong Answer
time: 20ms
memory: 18212kb

input:

1000 1000
196 207 195 207 200 203 202 204 205 191 190 188 203 198 201 188 203 198 196 196 200 195 200 206 193 198 186 196 200 185 202 195 203 199 185 199 202 191 184 194 195 194 193 195 184 197 189 193 186 187 193 193 196 186 195 193 186 192 188 188 187 197 179 188 195 196 197 186 194 183 189 185 19...

output:

158
16
110
64
160
118
169
63
172
128
93
82
118
119
86
32
174
145
139
84
149
120
133
155
108
110
65
178
90
99
118
91
133
85
151
76
130
50
91
99
95
78
110
87
119
141
68
81
172
82
112
139
136
81
79
16
51
31
104
116
108
38
75
176
156
55
165
112
146
74
68
172
112
157
94
177
111
166
110
112
98
155
109
155...

result:

wrong answer 109th lines differ - expected: '112', found: '113'