Compilare: main.cpp: In function 'int main()': main.cpp:107:9: warning: unused variable 'prvD' [-Wunused-variable] int prvD = 0; ^~~~ main.cpp:98:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ main.cpp:102:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &c[i][j]); ^