Compilare: main.cpp: In function 'int main()': main.cpp:36:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < g[x].size(); i++ ) { ~~^~~~~~~~~~~~~ main.cpp:11:45: warning: unused variable 'dx' [-Wunused-variable] int n, m, k, i, nr, a, b, c, x, dxy, y, dx; ^~ main.cpp:14:40: 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, &k ); ^ main.cpp:16:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &nr ); ^ main.cpp:23:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &a, &b, &c ); ^