Compilare: user.cpp: In function ‘int main()’: user.cpp:154:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < mp.size(); ++j) { ^ user.cpp:165:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < mp.size(); ++j) ^ user.cpp:113:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rutier.in", "r", stdin); ^ user.cpp:114:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rutier.out", "w", stdout); ^