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Submission #1031858

# Submission time Handle Problem Language Result Execution time Memory
1031858 2024-07-23T08:09:01 Z 김은성(#10960) Monochrome Points (JOI20_monochrome) C++17
0 / 100
 0 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
char s[400009];
int main(){
    int n, i;
    scanf("%d", &n);
    scanf(" %s", s);
    vector<int> b, w;
    for(i=0; i<2*n; i++){
        if(s[i] == 'B')
            b.push_back(i);
        else
            w.push_back(i);
    }
    int ans = 0;
    int temp = lower_bound(w.begin(), w.end(), b[0]+n) - w.begin();
    for(int j=temp-20; j<=temp+20; j++){
        int cnt = 0;
        for(i=0; i<n; i++){
            cnt += n - min((w[(i+j+n)%n]-b[i]+6*n)%(2*n), 2*n - (w[(i+j+n)%n]-b[i]+6*n)%(2*n));
        }
        ans = max(ans, n*(n-1)/2 - cnt/2);
    }
    printf("%d\n", ans);
    return 0;
}

Compilation message

monochrome.cpp: In function 'int main()':
monochrome.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
monochrome.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     scanf(" %s", s);
      |     ~~~~~^~~~~~~~~~

Subtask #1
0.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -