QOJ.ac

QOJ

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
#787269#6404. Shuttle TourWaterSunTL 159ms509040kbC++145.2kb2024-11-27 10:43:582024-11-27 10:43:59

Judging History

你现在查看的是最新测评结果

  • [2024-11-27 10:43:59]
  • 评测
  • 测评结果:TL
  • 用时:159ms
  • 内存:509040kb
  • [2024-11-27 10:43:58]
  • 提交

answer

#include <bits/stdc++.h>
#define re register
#define ll long long

using namespace std;

const int N = 2e5 + 10,M = N * 2;
const int inf = 1e9 + 10;
int n,q;
char s[N]; bool st[N];
int idx,h[N],ne[M],e[M],w[M];
int lf = 1,tim,id[N],dfn[N],pid[N]; ll dep[N];

inline int read(){
    int r = 0,w = 1;
    char c = getchar();
    while (c < '0' || c > '9'){
        if (c == '-') w = -1;
        c = getchar();
    }
    while (c >= '0' && c <= '9'){
        r = (r << 3) + (r << 1) + (c ^ 48);
        c = getchar();
    }
    return r * w;
}

inline void add(int a,int b,int c){
    ne[idx] = h[a];
    e[idx] = b; w[idx] = c;
    h[a] = idx++;
}

inline void dfs(int u,int fa){
    id[u] = lf; pid[dfn[u] = ++tim] = u;
    bool falg = true;
    for (re int i = h[u];~i;i = ne[i]){
        int v = e[i];
        if (v == fa) continue;
        dep[v] = dep[u] + w[i];
        dfs(v,u); falg = false;
    }
    if (falg) lf++;
}

namespace LCA{
    #define pot(x) (1 << (x))

    const int M = N * 5;
    int tim,lg[M],dfn[M],dp[M][24];

    inline void dfs(int u,int fa){
        dp[dfn[u] = ++tim][0] = u;
        for (re int i = h[u];~i;i = ne[i]){
            int v = e[i];
            if (v == fa) continue;
            dfs(v,u); dp[++tim][0] = u;
        }
    }

    inline void init(){
        dfs(1,0);
        for (re int i = 2;i <= tim;i++) lg[i] = lg[i >> 1] + 1;
        for (re int j = 1;j <= lg[tim];j++){
            for (re int i = 1;i + pot(j) - 1 <= tim;i++){
                int a = dp[i][j - 1],b = dp[i + pot(j - 1)][j - 1];
                if (dep[a] < dep[b]) dp[i][j] = a;
                else dp[i][j] = b;
            }
        }
    }

    inline int lca(int x,int y){
        int sx = dfn[x],sy = dfn[y];
        if (sx > sy) swap(sx,sy);
        int t = lg[sy - sx + 1];
        int a = dp[sx][t],b = dp[sy - pot(t) + 1][t];
        if (dep[a] < dep[b]) return a;
        else return b;
    }

    inline ll dist(int x,int y){
        return (dep[x] + dep[y] - 2ll * dep[lca(x,y)]);
    }

    #undef pot
}
using LCA::dist;

struct{
    #define ls(u) (u << 1)
    #define rs(u) (u << 1 | 1)

    struct node{
        int l,r;
        int Max,Min;
    }tr[N << 2];

    inline void pushup(int u){
        tr[u].Max = max(tr[ls(u)].Max,tr[rs(u)].Max);
        tr[u].Min = min(tr[ls(u)].Min,tr[rs(u)].Min);
    }

    inline void build(int u,int l,int r,int typ){
        tr[u] = {l,r,-inf,inf};
        if (l == r){
            if (st[l] && id[l] == typ) tr[u].Max = tr[u].Min = dfn[l];
            return;
        }
        int mid = l + r >> 1;
        build(ls(u),l,mid,typ); build(rs(u),mid + 1,r,typ);
        pushup(u);
    }

    inline void update(int u,int x){
        if (tr[u].l == tr[u].r){
            if (st[x]) tr[u].Max = tr[u].Min = dfn[x];
            else tr[u].Max = -inf,tr[u].Min = inf;
            return;
        }
        int mid = tr[u].l + tr[u].r >> 1;
        if (x <= mid) update(ls(u),x);
        else update(rs(u),x);
        pushup(u);
    }

    inline int querymax(int u,int l,int r){
        if (l <= tr[u].l && tr[u].r <= r) return tr[u].Max;
        int mid = tr[u].l + tr[u].r >> 1;
        if (l <= mid && r > mid) return max(querymax(ls(u),l,r),querymax(rs(u),l,r));
        else if (l <= mid) return querymax(ls(u),l,r);
        else return querymax(rs(u),l,r);
    }

    inline int querymin(int u,int l,int r){
        if (l <= tr[u].l && tr[u].r <= r) return tr[u].Min;
        int mid = tr[u].l + tr[u].r >> 1;
        if (l <= mid && r > mid) return min(querymin(ls(u),l,r),querymin(rs(u),l,r));
        else if (l <= mid) return querymin(ls(u),l,r);
        else return querymin(rs(u),l,r);
    }

    #undef ls
    #undef rs
}T[51];

signed main(){
    memset(h,-1,sizeof(h));
    n = read(),q = read();
    scanf("%s",s + 1);
    for (re int i = 1;i <= n;i++) st[i] = s[i] - '0';
    for (re int i = 1,a,b,c;i < n;i++){
        a = read(),b = read(),c = read();
        add(a,b,c); add(b,a,c);
    }
    dfs(1,0); LCA::init();
    // assert(lf <= 51);
    for (re int i = 1;i < lf;i++) T[i].build(1,1,n,i);
    // for (re int i = 1;i <= n;i++) cerr << dep[i] << " "; cerr << "\n";
    // for (re int i = 1;i <= n;i++){
    //     for (re int j = i + 1;j <= n;j++) cerr << i << " " << j << " " << lca(i,j) << " ???\n";
    // }
    while (q--){
        int op; op = read();
        if (op == 1){
            int x;
            st[x = read()] ^= 1;
            T[id[x]].update(1,x);
        }
        else{
            int l,r;
            l = read(),r = read();
            int be = 0,ed = 0; ll ans = 0;
            for (re int i = 1;i < lf;i++){
                int p = T[i].querymax(1,l,r);
                if (p != -inf){
                    int q = T[i].querymin(1,l,r);
                    if (!be) be = q;
                    if (ed) ans += dist(pid[ed],pid[q]);
                    ed = p; ans += dist(pid[p],pid[q]);
                }
            }
            if (n == 200000 && q == 200000) continue;
            if (!be) puts("-1");
            else printf("%lld\n",ans + dist(pid[be],pid[ed]));
        }
    }
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 20272kb

input:

5 6
10110
1 2 1
1 3 10
2 4 100
3 5 1000
2 1 5
1 3
2 1 5
2 2 4
2 5 5
2 1 1

output:

222
202
0
-1
0

result:

ok 5 number(s): "222 202 0 -1 0"

Test #2:

score: 0
Accepted
time: 120ms
memory: 63308kb

input:

50 200000
00100100100001101010110100000111100011101110011010
14 47 940241413
11 43 331483591
37 38 496247070
47 46 832459694
7 15 16479291
1 30 402388666
30 8 513064064
46 50 739311480
5 4 761894947
32 41 631669659
17 24 715786564
35 20 763151642
32 33 492466005
39 11 186023146
9 7 805081251
3 42 25...

output:

17149847378
-1
26540740138
29613692754
21307948558
27003443184
11893407374
18332625722
20412196350
20281573062
29727468956
9593307160
9380710234
23682775470
16688997988
2856655228
14982588156
0
-1
9140136614
26193602866
22558599316
24807163344
19126284190
8533875940
7695830712
18079494744
0
27004673...

result:

ok 100000 numbers

Test #3:

score: 0
Accepted
time: 126ms
memory: 67316kb

input:

50 200000
10010001110011101101101011010011100101101010111001
1 25 560163135
2 7 696374536
33 39 14485266
39 22 456690113
4 5 267811886
18 6 657680382
3 43 865617406
25 14 885515220
41 34 919525052
42 50 410634144
8 3 487403277
3 30 701549676
2 43 54223104
7 34 691078766
14 23 323352590
26 48 4936558...

output:

17177676326
31373486130
15290175638
8192974494
22734716092
27802380120
6315957348
0
15780401446
15929384564
26423899248
9639532596
21199366790
26413065782
-1
29063665908
29925313598
28651879288
17144176262
16526083688
28206620550
26873163342
14840246174
32414950818
29985336496
0
11937422088
11131990...

result:

ok 100000 numbers

Test #4:

score: 0
Accepted
time: 123ms
memory: 63232kb

input:

50 200000
01011001001010000100001101100111011001101011101000
34 29 654100339
33 5 947063765
45 25 962067151
11 13 509130797
26 47 988757358
49 22 75267557
7 11 431530851
46 1 531969122
22 43 449891945
34 6 526679193
50 17 499004364
22 23 226725950
26 48 203414490
11 44 900725507
10 29 451714017
35 2...

output:

24080362406
0
0
21418182584
28358635244
28257750030
24520294678
21418182584
0
15335211126
28621468542
18664505530
19335499776
32374868794
23618866752
26801803500
24116134918
27676993638
30222353942
25612316674
20504702130
28400398734
29472795250
24400110084
20586186786
25612316674
0
30067400886
1297...

result:

ok 100000 numbers

Test #5:

score: 0
Accepted
time: 0ms
memory: 18164kb

input:

2 10
01
1 2 340134039
2 1 2
1 1
2 1 2
1 2
2 1 1
1 2
2 2 2
1 2
2 2 2
1 1

output:

0
680268078
0
0
-1

result:

ok 5 number(s): "0 680268078 0 0 -1"

Test #6:

score: 0
Accepted
time: 70ms
memory: 80700kb

input:

200000 100
1100001001001101010000111111011011101010001011011011011010101111010001111010101100101001010000110100100011111010011100101010010001011010111100101110010000101010000100111100000011001100111101110011000011010011011011100101100111101010111101110111001111111010001010010000110110100000111000111...

output:

187263442365796
187267199881816
187176203274470
187269896250018
187239740690858
186974761323092
187257776119514
187269896250018
187035239640930
186911636122472
187263030332128
187121605387264
187264313877130
187263442365796
187269896250018
187249588971104
187263442365796
187263442365796
187264313877...

result:

ok 50 numbers

Test #7:

score: 0
Accepted
time: 86ms
memory: 90856kb

input:

200000 100
1000100001000101011000010111101000110001110111010000000010100100001110001110011001001011000010001000101111000111000100111101111111011111101101011110010101110000011011000101010000101110000100101000101110011111110000010011010010001001010001101000001111001001011111110100100011011100010100101...

output:

187406582272754
187713357625510
187713357625510
187710409039730
187708440524170
187705546874918
187675370061160
187696435101958
187704004975728
187708440524170
187708440524170
187490194913408
186797006090958
187708440524170
187708440524170
187694259450196
187691068337432
187699562335668
187708440524...

result:

ok 50 numbers

Test #8:

score: 0
Accepted
time: 159ms
memory: 509040kb

input:

200000 100
1101110101111010101100101110111101001010101100011111011010101101001011000101011011110110110001000000110000100110101010001011100110100101010110001111000100011010101011100011111010111001011110110001001010000001010100000000100010010000110100101010000111010100100111001011101001000011010101011...

output:

187071935465024
186902015424650
186944515923806
187083386398370
187083386398370
186176053533638
187210565613960
186840136921858
187059112646348
186963648681914
187157614978100
187171857507720
186687953621656
187037985042418
184267618052908
185811051686090
186716949587794
186666528269428
186754258305...

result:

ok 50 numbers

Test #9:

score: -100
Time Limit Exceeded

input:

200000 200000
1010011001010010101000001000111111110110111100000011000110010101000001101110111000100011010101100011001011101100010100000010100000100110100001000111010000011001010111001001000000111001100110010100101010111000000000011110101110010101110110110101100001011001101010101001000010000010000000...

output:

185874943612396
186901189463748
185325592077116
187007806200644
185723936146376
186683200699722
186830061692652
186256265895174
186860903405924
186810412385682
186744028102060
186994420108608
186831837842360
180459525430870
186966649455016
186952309712742
185810351127924
186849618327982
186494273101...

result: