#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define INIT std::ios::sync_with_stdio(false);std::cin.tie(0); // VAR(int, x); #define VAR(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__); template void Scan(T& t) { std::cin >> t; } templatevoid Scan(First& first, Rest&...rest) { std::cin >> first; Scan(rest...); } #define OUT(d) std::cout< c(n);for(auto& i:c)std::cin>>i; #define MAT(type, c, m, n) std::vector> c(m, std::vector(n));for(auto& r:c)for(auto& i:r)std::cin>>i; #define ALL(a) (a).begin(),(a).end() #define FOR(i, a, b) for(int i=(a);i<(b);++i) #define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i) #define REP(i, n) for(int i=0;i=0;--i) #define PAIR std::pair #define IN(a, x, b) (a<=x && x<=b) #define IN2(a0, y, a1, b0, x, b1) (a0<=y && y(end-start).count();std::cerr<<"[Time:"< swap; REP(i, n-1) { int min_i = std::distance(a.begin(), std::min_element(a.begin() + i, a.end())); if (min_i == i) continue; std::swap(a[i], a[min_i]); ++cnt; swap.emplace_back(i, min_i); } OUT(cnt)BR; REP(i, swap.size()) { OUT(swap[i].first)SP OUT(swap[i].second)BR; } FLUSH; VAR(int, dummy); return 0; }