Submission #72320

#	Time	Username	Problem	Language	Result	Execution time	Memory
72320		(#118)	Judge Against Wrong Code (FXCUP3_judge)	C++17	100 / 100	510 ms	19092 KiB

judge

#include<cstdio>
#include<algorithm>
#include<vector>
#include<bitset>
using namespace std;

bitset<20> dp[1<<20];
bool attack[1<<20];
int target[1<<20];
int targetsum[1<<20];

int X,D,C;

char buff[22];

char ans[555555];

int main(){
    scanf("%d",&X);
    scanf("%d",&D);

    for(int i=0;i<D;i++){
        scanf("%s",buff);
        int cur = 0;
        for(int i=0;i<X;i++) if(buff[i]=='o') cur |= (1<<i);
        attack[cur] = true;
    }

    scanf("%d",&C);
    for(int i=0;i<C;i++){
        scanf("%s",buff);
        int cur = 0;
        for(int i=0;i<X;i++) if(buff[i]=='x') cur |= (1<<i);
        target[cur]++;
    }

    for(int i=1;i<(1<<X);i++){
        if(attack[i]){
            dp[i] = i;
        }
        else{
            for(int j=0;j<X;j++) if(i&(1<<j)){
                dp[i] |= dp[i^(1<<j)];
            }
        }
    }

    for(int i=0;i<(1<<X);i++){
        attack[i] = (dp[i]==i);
    }

    for(int i=1;i<=C;i++) ans[i] = 'x';

    for(int i=0;i<(1<<X);i++) targetsum[i] = target[i];
    for(int i=0;i<X;i++) for(int j=0;j<(1<<X);j++) if(j&(1<<i))
        targetsum[j] += targetsum[j^(1<<i)];

    for(int i=0;i<(1<<X);i++) if(attack[i]){
        int cur = C;
        int nonattack = ((1<<X)-1)^i;
        cur -= targetsum[nonattack];
        ans[cur] = 'o';
    }

    printf("%s",ans+1);
    return 0;
}

Compilation message (stderr)

judge.cpp: In function 'int main()':
judge.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&X);
     ~~~~~^~~~~~~~~
judge.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&D);
     ~~~~~^~~~~~~~~
judge.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",buff);
         ~~~~~^~~~~~~~~~~
judge.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&C);
     ~~~~~^~~~~~~~~
judge.cpp:31:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",buff);
         ~~~~~^~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 39 / 39
• Subtask 3: 51 / 51