Submission #990201

#TimeUsernameProblemLanguageResultExecution timeMemory
990201AlphaMale06Snake Escaping (JOI18_snake_escaping)C++17
0 / 100
7 ms4956 KiB
#include <bits/stdc++.h> using namespace std; const int N = 21; int val[1<<N]; int dp[1<<N][N][2]; //0 je za ?1, 1 je za ?0 int main() { ios_base::sync_with_stdio(0); cin.tie(0); int n, q; cin >> n >> q; string s; cin >> s; for(int i=0; i<s.size(); i++){ val[i]=dp[i][0][0]=dp[i][0][1]=s[i]-'0'; } for(int i=1; i<=n; i++){ for(int j=0; j<(1<<n); j++){ if(j & (1<<(i-1))){ dp[j][i][0]=dp[j][i-1][0]+dp[j^(1<<(i-1))][i-1][0]; dp[j][i][1]=dp[j][i-1][1]; } else{ dp[j][i][1]=dp[j][i-1][1]+dp[j^(1<<(i-1))][i-1][1]; dp[j][i][0]=dp[j][i-1][0]; } } } while(q--){ string qry; cin >> qry; int cntu=0, cnt1=0, cnt0=0; for(char c : qry){ if(c=='?')cntu++; else if(c=='1')cnt1++; else cnt0++; } int mn = min({cntu, cnt1, cnt0}); int ans=0; int mask = 0; vector<int> pos; if(cntu == mn){ for(int i=0; i< n; i++){ if(qry[i]=='1')mask+=1<<(n-i-1); else if(qry[i]=='?')pos.push_back(n-1-i); } for(int i=0; i< (1<<cntu); i++){ int mask1=mask; for(int j=0; j<cntu; j++){ if(i & (1<<j)){ mask1+=1<<pos[j]; } } ans+=val[mask1]; } cout << ans << '\n'; } else if(cnt0 == mn){ for(int i=0; i< n; i++){ if(qry[i]=='1')mask+=1<<(n-i-1); else if(qry[i]=='0')pos.push_back(n-1-i); } ans = dp[mask][n][1]; for(int i=1; i< (1<<cnt0); i++){ int mask1=mask; for(int j=0; j<cnt0; j++){ if(i & (1<<j)){ mask1+=1<<pos[j]; } } ans-=dp[mask1][n][1]; } cout << ans << '\n'; } else{ for(int i=0; i< n; i++){ if(qry[i]=='?')mask+=1<<(n-i-1); else if(qry[i]=='1')pos.push_back(n-1-i); } ans = dp[mask][n][0]; for(int i=1; i< (1<<cnt1); i++){ int mask1=0; for(int j=0; j<cnt1; j++){ if(i&(1<<j))mask1+=1<<pos[j]; } ans-=dp[mask-mask1][n][0]; } cout << ans << '\n'; } } }

Compilation message (stderr)

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for(int i=0; i<s.size(); i++){
      |                  ~^~~~~~~~~
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