Compilare: main.cpp: In function 'int main()': main.cpp:41:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(mat[i]+1)<=n) ~~~~~~~~~~~~~~~~^~~ main.cpp:26:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("strigat.in", "r", stdin); ^ main.cpp:27:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("strigat.out", "w", stdout); ^ main.cpp:29:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &m); ^ main.cpp:31:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", mat[i]+1); ^ main.cpp:32:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &cost[i]); ^ main.cpp:28:34: warning: 'jj' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m,i,j,k,maxx=0,ll,l,ii,jj; ^~