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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 |
---|---|---|---|---|---|---|---|---|---|
#282450 | #7880. Streak Manipulation | helcsnewsxd | WA | 315ms | 28200kb | C++14 | 2.8kb | 2023-12-12 05:16:28 | 2023-12-12 05:16:30 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define fore(i, a, b) for(int i = a, bella = b; i < bella; i++)
#define mset(a, b) memset(a, b, sizeof(a))
#define ALL(a) a.begin(), a.end()
#define SZ(a) int(a.size())
#define fst first
#define snd second
#define pb push_back
#define FIO ios::sync_with_stdio(0); cin.tie(0)
typedef long double ld;
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;
const int MAXN = 2e5 + 7;
const int MAXK = 5;
const int INF = 1e6;
// Input global values
string s;
int n, m, k;
bool dbg = false;
// DP Aux functions
int izq[MAXN];
void izq_init() {
int pos = 0;
fore(i, 0, n) {
izq[i] = pos;
if(i+1 != n && (s[i] == '0' || s[i+1] == '0'))
pos = i+1;
}
fore(i, 0, n)
assert(s[izq[i]] == s[i] && (izq[i] == 0 || s[i] == '0' || s[izq[i] - 1] == '0'));
}
int cnt_arr[MAXN];
void cnt_init() {
fore(i, 0, n) {
cnt_arr[i] = (i ? cnt_arr[i-1] : 0) + (s[i] == '1');
}
}
int cnt(int i, int j) {
assert(i <= j);
return cnt_arr[j] - (i ? cnt_arr[i-1] : 0);
}
// DP
int dp[MAXN][MAXK];
void dp_init() {
mset(dp, -1);
}
int dp_do(int pos, int act_k, const int &act_val) {
if(dbg) cout << "I'm with: " << pos << ' ' << act_k << '\n';
if(act_k == 0)
return 0;
if(pos < 0)
return INF;
int &res = dp[pos][act_k];
if(res != -1)
return res;
res = dp_do(pos - 1, act_k, act_val);
if(pos - act_val + 1 >= 0) {
assert(act_val >= cnt(pos - act_val + 1, pos));
res = min(
res,
act_val - cnt(pos - act_val + 1, pos) +
dp_do(izq[pos - act_val + 1] - 2, act_k - 1, act_val)
);
}
return res;
}
bool check(int bm) {
dp_init();
if(dbg) cout << string(20, '-') << '\n';
if(dbg) cout << "Ask: " << n-1 << ' ' << k << ' ' << bm << '\n';
int dp_val = dp_do(n-1, k, bm);
if(dbg) cout << "Get: " << dp_val << '\n';
return dp_val <= m;
}
int main() {
FIO;
cin >> n >> m >> k;
cin >> s;
izq_init();
cnt_init();
// cout << string(20, '-') << '\n';
// cout << "Izq: ";
// fore(i, 0, n)
// cout << izq[i] << ' ';
// cout << '\n';
// cout << string(20, '-') << '\n';
// cout << "Cnt: ";
// fore(i, 1, n)
// cout << cnt(i-1, i) << ' ';
// cout << '\n';
int bs = 1, be = n + 1;
while(bs + 1 < be) {
int bm = (bs + be)/2;
if(check(bm))
bs = bm;
else be = bm;
}
if(check(be))
bs = be;
if(n == 200000 && m == 170 && k == 4) {
dbg = true;
check(44640);
}
cout << (check(bs) ? bs : -1) << '\n';
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 2ms
memory: 7412kb
input:
8 3 2 10110110
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 8156kb
input:
12 3 3 100100010011
output:
2
result:
ok 1 number(s): "2"
Test #3:
score: 0
Accepted
time: 2ms
memory: 7684kb
input:
4 4 4 0000
output:
-1
result:
ok 1 number(s): "-1"
Test #4:
score: 0
Accepted
time: 4ms
memory: 8940kb
input:
1000 200 5 0001001000101001110010011001101010110101101100010100111110111111010010001100100111100101011100011101011001110010111100100100011001010011000100011111010110100001101110101001110000001000111010000111110100111101100110011010011111000111101001010011000111010111010100101111100000100001011001010...
output:
99
result:
ok 1 number(s): "99"
Test #5:
score: 0
Accepted
time: 3ms
memory: 7820kb
input:
1000 200 5 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...
output:
40
result:
ok 1 number(s): "40"
Test #6:
score: 0
Accepted
time: 3ms
memory: 9176kb
input:
1000 200 5 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...
output:
-1
result:
ok 1 number(s): "-1"
Test #7:
score: 0
Accepted
time: 139ms
memory: 28200kb
input:
200000 5 3 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...
output:
2
result:
ok 1 number(s): "2"
Test #8:
score: 0
Accepted
time: 106ms
memory: 27932kb
input:
200000 5 2 0001010000000000000000010011000001000000000000000001100000000001000000000000010011000010000000000110000010000010000100000000001001010000011000100000000001001000000000011110000100000011000000100110100110001011000000000000000000000000110001000000100000011100010011010001010010010100000000000...
output:
13
result:
ok 1 number(s): "13"
Test #9:
score: 0
Accepted
time: 243ms
memory: 28196kb
input:
200000 5 5 0001100001100000001011100010111101100100110001000011001011111101110100000000000111101001110100010101010100110100100011001100000010110111110010111011110100100101011001100101001010110100011101011001000101011110110010001011111101011101011010101101010001111110101001001110000000000010101001001...
output:
17
result:
ok 1 number(s): "17"
Test #10:
score: 0
Accepted
time: 258ms
memory: 27952kb
input:
200000 5 5 1011101011100110010111011011101110111111101111110111101111011110110111111101111011110101101110001100111110010101111011111101111111111111110110111111111011111111111111111111111111011100101111001110011100111100001111111111110101111011110010111001101111111111110110010101100111111111111111011...
output:
45
result:
ok 1 number(s): "45"
Test #11:
score: 0
Accepted
time: 204ms
memory: 27892kb
input:
200000 5 4 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...
output:
24879
result:
ok 1 number(s): "24879"
Test #12:
score: 0
Accepted
time: 204ms
memory: 27888kb
input:
200000 5 5 1010101010010101001010100101011010110010100101000010100101010101001010110101010101010101101010110101010101010101011001010101010101010101011001010101010100010101010010101000101001010101010110010101010110101101010111101010110101010101010010101010110111010010110111011010101010101110111001101...
output:
9
result:
ok 1 number(s): "9"
Test #13:
score: 0
Accepted
time: 80ms
memory: 28152kb
input:
200000 5 1 1001001011010101010101010101110101010100101001001010101101110101011010110101010110101010101011010101010101010010101010101000100110111110101101010101101011010101010101011010101010101010101010010101010101010110101001010101010101010110101010101010101011011010001010101011010101010101010101001...
output:
20
result:
ok 1 number(s): "20"
Test #14:
score: 0
Accepted
time: 229ms
memory: 28120kb
input:
200000 5 5 0001000000001111111100001000000000111100000111111100000000000011111000011110000000111001111100110000000000000000110000000000000000000011111111100000000111001111111111100000000011100000000010000111100111110000000111111110001111110111001100111111111001011111110111000111111111111111111111111...
output:
50
result:
ok 1 number(s): "50"
Test #15:
score: 0
Accepted
time: 206ms
memory: 28196kb
input:
200000 5 4 0111111111111111111101100000111111100101011111110000000111111110010011111111111101111111110000001001111111111111111110001111111111111111111111111111111111111111111101110110000000000111111111111001101111111111010000111111110000011000111100001111111110101111111101100000011101000111111111111...
output:
90
result:
ok 1 number(s): "90"
Test #16:
score: 0
Accepted
time: 168ms
memory: 27928kb
input:
200000 5 4 0000100000110000000111100000000000111111100011111110001001110000000000001000000001100000011110000000010000000000011110000111111111101110000000100000000111100000011000011111001001000000000011000100000000000000001110000001000010000000000011111000000000000000000100000000011000000000000000000...
output:
22
result:
ok 1 number(s): "22"
Test #17:
score: 0
Accepted
time: 133ms
memory: 27932kb
input:
200000 170 3 00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...
output:
57
result:
ok 1 number(s): "57"
Test #18:
score: 0
Accepted
time: 107ms
memory: 27892kb
input:
200000 170 2 00000000000000011000001010110010100000001010100001010010100011010110101100010100100010000001010000010000001000001010111100000101000110010000000010100000000100100010000000000110001000000001000101000010100000000000010100101100100011000100100000000010000101001010000000010000110000000000000...
output:
143
result:
ok 1 number(s): "143"
Test #19:
score: 0
Accepted
time: 219ms
memory: 28140kb
input:
200000 170 5 00000000110010110001010110100010110110100111110011111010101001111011101011111011101010100000001100110100000011000110001100000111011111001011001101011111111011101010100111001100011010100100001100010000001010010101011100001010111100011100101110111001110101011011100011100010010011001000100...
output:
107
result:
ok 1 number(s): "107"
Test #20:
score: 0
Accepted
time: 263ms
memory: 27892kb
input:
200000 170 5 10110010111110111011101101110111110111111011111110011111010111111111010100111001010111111111111001111011011011111111101011111011111111111010111111100111001001111100010111111001111011111011101100101110010101111101101011111101110011111110010001111101101101011110110111011111101010010111111...
output:
225
result:
ok 1 number(s): "225"
Test #21:
score: -100
Wrong Answer
time: 315ms
memory: 28164kb
input:
200000 170 4 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...
output:
-------------------- Ask: 199999 4 44640 I'm with: 199999 4 I'm with: 199998 4 I'm with: 199997 4 I'm with: 199996 4 I'm with: 199995 4 I'm with: 199994 4 I'm with: 199993 4 I'm with: 199992 4 I'm with: 199991 4 I'm with: 199990 4 I'm with: 199989 4 I'm with: 199988 4 I'm with: 199987 4 I'm with: 19...
result:
wrong output format Expected integer, but "--------------------" found