Compilare: main.cpp: In function 'int main()': main.cpp:28:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:36:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:52:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:16:17: warning: unused variable 'nr' [-Wunused-variable] int n,m,i,j,nr; ^~ main.cpp:14:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe2.in","r",stdin); ^ main.cpp:15:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe2.out","w",stdout); ^ main.cpp:17:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:18:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=m;i++)scanf("%d",&k[i]); ^ main.cpp:22:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i][j]); ^