Submission #870362

#	Time	Username	Problem	Language	Result	Execution time	Memory
870362		Alora	Election (BOI18_election)	C++17	28 / 100	3063 ms	1408 KiB

election

#include <bits/stdc++.h>
#define Alora "cownav"
#define fi(i,a,b) for(int i = a; i <= b; i++)
#define fid(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define f first
#define se second
#define pii pair<int, int>
#define getbit(i, j) ((i >> j) & 1)
#define all(v) v.begin(), v.end()
#define pb push_back
#define maxn 300005
const int M = 1e9 + 7;
using namespace std;
int n, q, xd[maxn];
string s;

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	if(fopen(Alora".inp","r")){
    freopen(Alora".inp","r",stdin);
    freopen(Alora".out","w",stdout);}
    cin >> n >> s; s = ' ' + s;
    cin >> q;
    while(q--){
        int l, r; cin >> l >> r;
        fi(i, 1, n) xd[i] = 0;
        int c = 0, t = 0;
        fi(i, l, r){
            if(s[i] == 'C') c++;
            else{
                if(t < c) t++;
                else xd[i] = 1;
            }
        }
        c = t = 0;
        fid(i, r, l){
            if(s[i] == 'C') c++;
            else if(xd[i] == 0){
                if(t < c) t++;
                else xd[i] = 1;
            }
        }
        int ans = 0;
        fi(i, 1, n) ans += xd[i];
        cout << ans << '\n';
    }
    return 0;
}

Compilation message (stderr)

election.cpp: In function 'int main()':
election.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     freopen(Alora".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
election.cpp:23:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |     freopen(Alora".out","w",stdout);}
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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