제출 #785663

#제출 시각아이디문제언어결과실행 시간메모리
785663bachhoangxuanToilets (JOI16_toilets)C++17
0 / 100
1 ms212 KiB
// Judges with GCC >= 12 only needs Ofast // #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize") // MLE optimization // #pragma GCC optimize("conserve-stack") // Old judges // #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2") // New judges. Test with assert(__builtin_cpu_supports("avx2")); // #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native") // Atcoder // #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma") /* #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace __gnu_pbds; typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set; - insert(x),erase(x) - find_by_order(k): return iterator to the k-th smallest element - order_of_key(x): the number of elements that are strictly smaller */ #include<bits/stdc++.h> using namespace std; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); uniform_real_distribution<> pp(0.0,1.0); #define int long long #define ld long double #define pii pair<int,int> #define piii pair<int,pii> #define mpp make_pair #define fi first #define se second const int inf=1e18; const int mod=1e9+7; const int maxn=200005; const int bl=650; const int maxs=655; const int maxm=200005; const int maxq=500005; const int maxl=20; const int maxa=250000; const int root=3; int power(int a,int n){ int res=1; while(n){ if(n&1) res=res*a%mod; a=a*a%mod;n>>=1; } return res; } const int iroot=power(3,mod-2); const int base=101; void solve(){ int n,m;cin >> n >> m; auto f = [&](pii a,pii b){return mpp(max(a.fi,a.se+b.fi),a.se+b.se);}; pii cur={0,0}; for(int i=1;i<=m;i++){ string s;int k;cin >> s >> k; int sum=0,Max=0; for(char c:s){ sum+=(c=='M'?-1:1); Max=max(Max,sum); } pii p={Max,sum}; for(int j=0;j<=60;j++){ if(k&(1LL<<j)) cur=f(cur,p); p=f(p,p); } } if(cur.se<0) cout << -1 << '\n'; else cout << (cur.fi+1)/2-cur.se << '\n'; } signed main(){ ios_base::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL); int test=1;//cin >> test; while(test--) solve(); }
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