Compilare: main.cpp: In function 'int main()': main.cpp:36:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < v[poz].size() ; j++) ~~^~~~~~~~~~~~~~~ main.cpp:39:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == v[poz].size()){ ~~^~~~~~~~~~~~~~~~ main.cpp:56:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < v[i].size() ; j++){ ~~^~~~~~~~~~~~~ main.cpp:11:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:13:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:17:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&a[i][j]); ^