Compilare: user.cpp: In function ‘int main()’: user.cpp:14:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n; ++i) ^ user.cpp:15:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j <= m; ++j) ^ user.cpp:19:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i <= m; ++i) d[2][i] = a[1][1] + a[1][i] + a[2][i]; ^ user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < n; ++i) ^ user.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 2; j <= m; ++j) ^ user.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d[i][j] < min1) ^ user.cpp:43:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(d[i][j] < min2) min2 = d[i][j]; ^ user.cpp:45:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j <= m; ++j) ^ user.cpp:56:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 2; j <= m; ++j) ^ user.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d[n][j] < min1) min1 = d[n][j]; ^