Compilare: user.cpp: In function ‘void solve1(int, int)’: user.cpp:26:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<q[p].size();j++) ^ user.cpp: In function ‘void solve2(int, int)’: user.cpp:53:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<q[p].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:85:50: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘char*’ [-Wformat=] for(int j=1;j<=n;j++) scanf("%d",&v[i][j]); ^ user.cpp:80:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.in","r",stdin); ^ user.cpp:81:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.out","w",stdout); ^ user.cpp:83:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:85:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int j=1;j<=n;j++) scanf("%d",&v[i][j]); ^ user.cpp:86:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&l1,&c1,&l2,&c2); ^