Compilare: main.cpp: In function 'int main()': main.cpp:35:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < g[y].size(); i++ ) { ~~^~~~~~~~~~~~~ main.cpp:41:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 1; j < apm[1].size(); j++ ) ~~^~~~~~~~~~~~~~~ main.cpp:44:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < apm[i].size(); j++ ) ~~^~~~~~~~~~~~~~~ main.cpp:17:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &m ); ^ main.cpp:19:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &a, &b, &c ); ^