Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:94:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < rds[nxt].size(); j++) ^ user.cpp:112:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < rds[nxt].size(); j++) ^ user.cpp:69:9: warning: unused variable ‘P’ [-Wunused-variable] int P = edg[nod].size(); ^ user.cpp: In function ‘int main()’: user.cpp:146:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaj3.in", "r", stdin); ^ user.cpp:147:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaj3.out", "w", stdout); ^ user.cpp:150:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:154:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ user.cpp:172:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &M); ^ user.cpp:176:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &z); ^