Submission #258517

#	Time	Username	Problem	Language	Result	Execution time	Memory
258517		arnold518	Toilets (JOI16_toilets)	C++14	100 / 100	107 ms	7416 KiB

toilets

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const ll MAXN = 1e18;
const int MAXM = 2e5;

ll N, M;
string S[MAXM+10];
ll K[MAXM+10];
ll sum=0, ans=1;

int main()
{
	int i, j;

	cin>>N>>M;
	for(i=1; i<=M; i++) cin>>S[i]>>K[i];

	for(i=M; i>=1; i--)
	{
		ll t=0, k=0;
		for(j=S[i].size()-1; j>=0; j--)
		{
			if(S[i][j]=='F') t--;
			else t++;
			k=max(k, t);
		}
		ans=max(ans, max(sum+k, sum+t*(K[i]-1)+k));
		sum+=K[i]*t;
	}

	if(sum>0) return !printf("-1\n");
	printf("%lld\n", ans-1);
}

• Subtask 1: 14 / 14
• Subtask 2: 22 / 22
• Subtask 3: 64 / 64