Submission #235709

#	Time	Username	Problem	Language	Result	Execution time	Memory
235709		Kalam	Ili (COI17_ili)	C++11	100 / 100	1046 ms	13560 KiB

ili

// KALAM
# include<bits/stdc++.h>

using namespace std;

const int N = 10000 + 77;
int n , m , F[N] , G[N];
bitset < N > B[N] , P , I , E;
vector < int > adj[N];
char S[N];
int main() {
   scanf("%d %d" , & n , & m);
   scanf("%s" , S + 1);
   for(int i = 1;i <= n;++ i)
      P[i] = 1 , I[i] = 1;
   for(int i = 1;i <= m;++ i) {
      int k = 2;
      while(k --) {
         char c;
         int x;
         scanf(" %c%d" , & c , & x);
         if(c == 'x') B[i][x] = 1 , adj[i].push_back(x);
         else B[i] |= B[x] , adj[i].push_back(-x);
      }
      if(S[i] == '0')
         P = (P & (I ^ B[i]));
   }
   for(int i = 1;i <= m;++ i)
      B[i] &= P;
   for(int i = 1;i <= m;++ i)
      if(B[i] == E && S[i] == '?')
         S[i] = '0';
   for(int i = 1;i <= m;++ i) {
      if(S[i] != '?')
         continue ;
      memset(F , 0 , sizeof F);
      memset(G , 0 , sizeof G);
      for(int j = 1;j <= n;++ j)
         F[j] = (P[j] & (!B[i][j]));
      for(int j = 1;j <= m;++ j) {
         for(int x : adj[j]) {
            if(x >= 0)
               G[j] |= F[x];
            else
               G[j] |= G[-x];
         }
      }
      bool good = 1;
      for(int j = 1;j <= m;++ j)
         if(S[j] != '?')
            good &= (G[j] == (S[j] - '0'));
      if(!good)
         S[i] = '1';
   }

   for(int i = 1;i <= m;++ i)
      printf("%c" , S[i]);

   return 0;
}

Compilation message (stderr)

ili.cpp: In function 'int main()':
ili.cpp:12:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d" , & n , & m);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~
ili.cpp:13:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%s" , S + 1);
    ~~~~~^~~~~~~~~~~~~~
ili.cpp:21:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
          scanf(" %c%d" , & c , & x);
          ~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 42 / 42
• Subtask 3: 51 / 51