Compilare: main.cpp: In function 'int main()': main.cpp:36:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:44:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:60:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:19:35: 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:20:37: 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:23:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:24:40: 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]);mp[k[i]]=i;} ^ main.cpp:29:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr); ^