Compilare: main.cpp: In function 'int main()': main.cpp:21:20: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 21 | for (j=1; j<strlen(c); j++) | ~^~~~~~~~~~ main.cpp:45:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'long long unsigned int' [-Wsign-compare] 45 | if (col>a[x][2001]) col=a[x][2001]; | ~~~^~~~~~~~~~~