Submission #68257

#	Time	Username	Problem	Language	Result	Execution time	Memory
68257		Bruteforceman	Election (BOI18_election)	C++11	28 / 100	3044 ms	3124 KiB

election

#include "bits/stdc++.h"
using namespace std;
int a[500010];
int p[500010];

int solve(int l, int r) {
	int cur = 0;
	int ans = 0;
	int mx = 0;
	for(int i = l; i <= r; i++) {
		cur += a[i];
		if(cur < 0) {
			++ans;
			cur = 0;
		}
		mx = max(mx, cur);
	}
	ans += mx - cur;
	return ans;
}
char s[500010];

int main(int argc, char const *argv[])
{
	int n;
	scanf("%d", &n);
	scanf("%s", s);
	for(int i = 1; i <= n; i++) {
		a[i] = s[i - 1] == 'C' ? 1 : -1;
	}
	int q;
	scanf("%d", &q);
	while(q--) {
		int l, r;
		scanf("%d %d", &l, &r);
		printf("%d\n", solve(l, r));
	}
	return 0;
}

Compilation message (stderr)

election.cpp: In function 'int main(int, const char**)':
election.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
election.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", s);
  ~~~~~^~~~~~~~~
election.cpp:32:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &q);
  ~~~~~^~~~~~~~~~
election.cpp:35:8: 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