Compilare: user.cpp: In function ‘int main()’: user.cpp:34:24: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(ni == n && nj == m || 1LL * v[i][j] * v[i][j] * dist[ni][nj] > 1LL * v[ni][nj] * v[ni][nj] * (dl * dl + dc * dc)){ ^ user.cpp:13:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d", &c, &n, &m); ^ user.cpp:16:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &v[i][j]); ^