Compilare: main.cpp: In function 'int main()': main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(aux.size()<soll){ ~~~~~~~~~~^~~~~ main.cpp:67:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<aux.size(); i++) ~^~~~~~~~~~~ main.cpp:113:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(aux.size()<soll){ ~~~~~~~~~~^~~~~ main.cpp:116:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<aux.size(); i++) ~^~~~~~~~~~~ main.cpp:16:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("numere3.in", "r", stdin); ^ main.cpp:17:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("numere3.out", "w", stdout); ^ main.cpp:20:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &m, &n, &k); ^ main.cpp:23:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[i][j]); ^ main.cpp:36:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^