Compilare: user.cpp: In function ‘void solve()’: user.cpp:44:15: warning: unused variable ‘mx’ [-Wunused-variable] int i, j, mx, l; ^ user.cpp:44:19: warning: unused variable ‘l’ [-Wunused-variable] int i, j, mx, l; ^ user.cpp: In function ‘void readFile()’: user.cpp:19:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:26:74: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &a[i][j]), dp[i][j] = a[i][j], sum += a[i][j]; ^