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当前Rank 999,终于挤进了前1000,1A留念~#include<cstdio> #include<cstring> #include<algorithm> using namespace std; int degree[21]; char buf[1024]; int S, N, M; int main() { while(true) { scanf("%s", buf); if(strcmp(buf, "ENDOFINPUT") == 0) { break; } memset(degree, 0, sizeof(degree)); M = 0; scanf("%d %d", &S, &N); getchar(); for(int i = 0; i < N; i ++) { gets(buf); int L = strlen(buf); int idx = 0; while(idx < L) { int a = 0; sscanf(buf + idx, "%d", &a); M ++; degree[i] ++; degree[a] ++; idx ++; while (idx < L && buf[idx] != ' ') { idx ++; } } } if(S == 0) { bool flag = true; for(int i = 0; i < N; i ++) { if(degree[i] & 1) { flag = false; break; } } if(flag) { printf("YES %d\n", M); } else { printf("NO\n"); } } else { int c = 0; for(int i = 0; i < N; i ++) { if(degree[i] % 2 == 0) { c ++; } } if(c == N - 2 && degree[0] & 1 && degree[S] & 1){ printf("YES %d\n", M); } else { printf("NO\n"); } } gets(buf); } } Followed by: Post your reply here: |
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