Submission #1186253

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186253		hihihihaw	Election (BOI18_election)	C++20	28 / 100	3093 ms	1424 KiB

election

#pragma GCC optimize("O3,unroll-loops")    
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define pb push_back
#define pii pair<int,int>
#define sz(v) (int)v.size()
#define fi first
#define se second
#define INF 1223372036854775807
#define MOD 998244353ll
#define cint(x) int x;cin>>x;
#define cinarr(a,n) int a[n];for (int i=0;i<n;i++) cin>>a[i];
#define coutarr(a) for (auto d:a)cout<<d<<" "; cout<<endl;
#define coutarrD(a) for (auto d:a) cout<<d.fi<<","<<d.se<<" "; cout<<endl;
#define BERKAY_TUP ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define endl '\n'
#define ld long double
#define mid (start+end)/2
#define vvi vector<vector<int>>
int t=1;
int interactive=0;
int usaco=0;
int testCase=0;


void solve(){
    int n;
    cin>>n;
    string s;
    cin>>s;
    int q;
    cin>>q;
    while (q--){
        int l,r;
        cin>>l>>r;
        l--;r--;
        int z[n]={};
        int c=0;
        int ans=0;
        for (int i=l;i<=r;i++){
            if (s[i]=='C') c++;
            else{
                if (c-1<0){
                    z[i]=1;
                    ans++;
                }
                else c--;
            }
        }
        c=0;
        for (int i=r;i>=l;i--){
            if (z[i]) continue;
            if (s[i]=='C') c++;
            else{
                if (c-1<0){
                    z[i]=1;
                    ans++;
                }
                else c--;
            }
        }
        cout<<ans<<endl;
    }

}

 
 
 
 
 
 

 
int32_t main(){
    
    //BERKAY_TUP;
    if (usaco){
        freopen("team.in", "r", stdin);
        freopen("team.out", "w", stdout);
    }
    if (!interactive){
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
        //freopen("wormsort.out", "w", stdout);
    #endif
    }
    if (t==1) solve();
    else{
        cin>>t;
        while (t--){testCase++;solve();}
    }
    
        
    return 0;
}

Compilation message (stderr)

election.cpp: In function 'int32_t main()':
election.cpp:81:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |         freopen("team.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
election.cpp:82:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |         freopen("team.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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