Compilare: main.cpp: In function 'bool verif(int)': main.cpp:82:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l=0; l<g.size(); l++){ ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:96:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("robotics.in", "r",stdin); ^ main.cpp:97:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("robotics.out", "w",stdout); ^ main.cpp:99:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &t); ^ main.cpp:101:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &tip); ^