Compilare: main.cpp: In function 'int main()': main.cpp:16:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1; i<=N; ++i) Graph[i].push_back(0); Sol=N; fgetc(stdin); ^~~ main.cpp:16:48: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i=1; i<=N; ++i) Graph[i].push_back(0); Sol=N; fgetc(stdin); ^~~ main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<Graph[i].size(); ++j) if(Graph[Graph[i][j]][0]==0){ ~^~~~~~~~~~~~~~~~ main.cpp:13:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("berarii2.in", "r", stdin); ^ main.cpp:14:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("berarii2.out", "w", stdout); ^ main.cpp:15:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &N, &M, &P); ^ main.cpp:19:28: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(c, 25, stdin); k=-1; ^ main.cpp:25:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^