Compilare: main.cpp: In function 'int main()': main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < g[nd].size(); i++ ) { ~~^~~~~~~~~~~~~~ main.cpp:12:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &n, &m, &s ); ^ main.cpp:14:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &x, &y ); ^