Submission #60014

#	Time	Username	Problem	Language	Result	Execution time	Memory
60014		Kerim	Election (BOI18_election)	C++17	28 / 100	3037 ms	1236 KiB

election

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
char s[MAXN];
int vis[MAXN];
int main(){
    //~ freopen("file.in", "r", stdin);
    int n;
    scanf("%d",&n);
    scanf("%s",s+1);
    int q;
    scanf("%d",&q);
    while(q--){
		int l,r;
		scanf("%d%d",&l,&r);
		int par=0;
		for(int i=l;i<=r;i++){
			par+=(s[i]=='C');
			par-=(s[i]=='T');
			if(par<0)
				par=0,vis[i]=1;
		}par=0;
		for(int i=r;i>=l;i--)
			if(!vis[i]){
				par+=(s[i]=='C');
				par-=(s[i]=='T');
				if(par<0)
					par=0,vis[i]=1;
			}
		int ans=0;	
		for(int i=l;i<=r;i++){
			ans+=vis[i];
			vis[i]=0;
		}	
		printf("%d\n",ans);
	}
	return 0;
}

Compilation message (stderr)

election.cpp: In function 'int main()':
election.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
election.cpp:26:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s",s+1);
     ~~~~~^~~~~~~~~~
election.cpp:28:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&q);
     ~~~~~^~~~~~~~~
election.cpp:31:8: 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