Compilare: main.cpp: In function 'void solve(unsigned int, unsigned int)': main.cpp:24:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x2<n&&y2<m) ~~^~ main.cpp:24:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x2<n&&y2<m) ~~^~ main.cpp:26:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nrk<=k&&x2<=n&&y2<=m) ~~^~~ main.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nrk<=k&&x2<=n&&y2<=m) ~~^~~ main.cpp:44:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nrk>k&&x2<=n&&y2<=m) ~~^~~ main.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nrk>k&&x2<=n&&y2<=m) ~~^~~ main.cpp: In function 'int main()': main.cpp:80:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2; i<=N; i++) ~^~~ main.cpp:95:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ~^~~ main.cpp:97:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=2; j<=m; j++) ~^~~