Compilare: main.cpp: In function 'int main()': main.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<pairs[0].size();i++){ /// daca n = 2 ~^~~~~~~~~~~~~~~~ main.cpp:85:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<pairs[1].size();i++){ /// daca n = 4 ~^~~~~~~~~~~~~~~~ main.cpp:103:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<pairs[2].size();i++){ /// daca n = 8 ~^~~~~~~~~~~~~~~~ main.cpp:121:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<pairs[3].size();i++){ /// daca n = 16 ~^~~~~~~~~~~~~~~~ main.cpp:22:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:56:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:59:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&a[i][j]); ^