Submission #1026852

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,a) FOR(i,0,a)
typedef long long ll;

const int MAX_S_LEN=1e5;

char S[MAX_S_LEN+1];


int len;
ll tri[MAX_S_LEN/2+1];

int findNico(int x){
	int res=0;
	while(x<len-1 && S[x]=='2' && S[x+1]=='5'){
		x+=2;
		res++;
	}
	return res;
}

int main(){
	scanf("%s",S);
	len=strlen(S);
	tri[1]=1;
	FOR(i,2,len/2+1){
		tri[i]=tri[i-1]+i;
	}
	ll ans=0;
	REP(i,len){
		if (i<len-1 && S[i]=='2' && S[i+1]=='5'){
			int l=findNico(i);
			ans+=tri[l];
			i+=2*l;
			i--;
		}
	}
	printf("%lld\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:25:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result