Compilare: main.cpp: In function 'int main()': main.cpp:231:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Queue.front().second.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:249:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < left.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:253:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < right.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp:169:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(IN, "%d%d", &N, &Q); ^ main.cpp:177:47: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(IN, "%d", &Mat[i][j].value); ^ main.cpp:200:67: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(IN, "%d%d%d%d", &aux.x1, &aux.y1, &aux.x2, &aux.y2); ^