Compilare: main.cpp: In function 'int main()': main.cpp:32:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < bfs[c].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp:15:61: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d%d%d", &n, &m, &x, &y, &endx, &endy); ^ main.cpp:19:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &code[i][j]); ^