Submission #122980

#	Time	Username	Problem	Language	Result	Execution time	Memory
122980		Leonardo_Paes	Ronald (COCI17_ronald)	C++11	120 / 120	32 ms	1272 KiB

ronald

#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e3+3;

bool state[maxn], tab[maxn][maxn], ok=1;

#define gc getchar

inline int scan(void){
	int n = 0, x = gc(), s =1;
	for (;x<'0'||x>'9';x=gc()) if(x=='-') s=-1;
	for (;x>='0'&&x<='9';x=gc()) n = (n<<3) + (n<<1) + x-'0';
	return n;
}

int main(){

    int n, m;

    n = scan(), m = scan();

    for(int i=0; i<m; i++){
        int x, y;
        x = scan(), y = scan();
        tab[x][y]=tab[y][x]=1;
    }

    for(int i=2; i<=n; i++){
        state[i]=state[i-1];
        if(tab[i][i-1]==0)state[i]^=1;
    }

    for(int i=1; i<=n; i++){
        for(int j=i+1; j<=n; j++){
            int sum = state[i]+state[j];
            if(tab[i][j]==0)if(sum%2==0)ok=0;
            if(tab[i][j]==1)if(sum%2==1)ok=0;
        }
        if(ok==0){
            printf("NE\n");
            return 0;
        }
    }
    printf("DA\n");
}

Compilation message (stderr)

ronald.cpp: In function 'int scan()':
ronald.cpp:12:23: warning: variable 's' set but not used [-Wunused-but-set-variable]
  int n = 0, x = gc(), s =1;
                       ^

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 15 / 15
• Subtask 6: 15 / 15
• Subtask 7: 15 / 15
• Subtask 8: 15 / 15