Compilare: main.cpp: In function 'void go(int)': main.cpp:59:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < g[nd].size(); i++ ) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:137:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &v, &n, &k ); ^ main.cpp:139:116: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d%d%d%d", &tr[i][0].x, &tr[i][0].y, &tr[i][1].x, &tr[i][1].y, &tr[i][2].x, &tr[i][2].y ); ^