Submission #63525

#	Time	Username	Problem	Language	Result	Execution time	Memory
63525		kylych03	Election (BOI18_election)	C++14	28 / 100	10 ms	1140 KiB

election

#include <bits/stdc++.h>
 
using namespace std;
 
#define ll long long
 
const int N = (int)2e3 + 7;
 
int used[N];
 
main() {
  int n;
  string s;
  scanf("%d", &n);
  cin >> s;
  s = " " + s;
  int q;
  scanf("%d", &q);
  while (q--) {
    int l, r;
    int ans = 0;
    scanf("%d %d", &l, &r);
    int b = 0;
    for (int i = l; i <= r; i++) {
      b += ((s[i] == 'T') ? -1 : 1);
      if (b < 0) {
        used[i] = 1;
        ans++;
        b++;
      }
    }
    b = 0;
    for (int i = r; i >= l; i--) {
      if (used[i]) {
        used[i] = 0;
        continue;
      }
      b += ((s[i] == 'T') ? -1 : 1);
      if (b < 0) {
        //used[i] = 1;
        ans++;
        b++;
      }
    }
    printf("%d\n", ans);
  }
}

Compilation message (stderr)

election.cpp:11:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
election.cpp: In function 'int main()':
election.cpp:14:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
   ~~~~~^~~~~~~~~~
election.cpp:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &q);
   ~~~~~^~~~~~~~~~
election.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &l, &r);
     ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 28 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18